基于信噪比测量时钟抖动的方法  

Clock jitter measurement technique based on signal-to-noise ratio

作　　者：吴义华[1] 杨俊峰[1] 何正淼[1] 王砚方[1] 

机构地区：[1]中国科学技术大学近代物理系,合肥230026

出　　处：《吉林大学学报（工学版）》2006年第4期604-607,共4页Journal of Jilin University:Engineering and Technology Edition

基　　金：'863'国家高技术研究发展计划项目(2001AA602011-1)

摘　　要：研究了高速数据采集系统中时钟抖动对信噪比的影响,进而提出一种基于信噪比测量时钟抖动的方法。在采样-保持电路的模型的基础上,推导出信噪比与抖动及输入信号频率之间的数学公式,并对其进行了仿真。最后使用这种方法实际测量了两种时钟的抖动。结果表明,该方法操作简单、测量精确。The effect of the clock jitter on the signal-to-noise ratio （SNR） in the high-speed data acquisition system was studied and a new technique to measure the clock jitter based on SNR was proposed. A mathematical formula to link the SNR and the clock jitter as well as the input signal frequency was derived based on the sampl-hold circuit model and its simulation was done. Two kinds of clock jitter were measured with the proposed technique and results show it is characterized by easy operation and high resolution.

关 键 词：信息处理技术 时钟抖动 信噪比 采样 

分 类 号：TN919.1[电子电信—通信与信息系统]